Honing machine



Dec. 30, 1947. P. H. HUTCHINSON HONING MACHINE Filed Dec. 28, 1944 2 Sheets-Sheet 1 HIS AT TOBNEY c- 1947- P. H. HUTCHINSON 2,433,455

HON'ING MACHINE Filed Dec. 28, 1944 2 Sheets-Sheet 2 INVENTOE WW Mm BY 06%; 4%

H/SATTOIZNEY a... Dec. 30, 1941 HONING moms Application December 28, 1944, Serial No. 570,110

11 Claims.

This invention relates to honing machines and the like and comprises all of the features of novelty herein disclosed. An object of the invention is to provide improved apparatus for supporting and rotating a work piece for an abrading operation, more especially a ring to be internally honed;

To these ends and also to improve generally upon apparatus of this character, the invention consists in. the various matters hereinafter described and claimed. In its broader aspects, the invention is not necessarily limited to the speciflc construction selected for illustrative purposes in the accompanying drawings in which Fig. 1 is a plan view.

Fig. 2 is chiefly a vertical central section of Fig. 1, one of the roll spindle housings being in section on line 22 of Fig. 1 to illustrate its inclination.

Fig. 3 is a section on line 3-3 of Fig. 2.

Fig. 3A is a diagrammatic plan view.

Fig. 4 is a plan view of a wedge ring.

Fig. 5 is a side view of the wedge ring.

Fig. 6 is a plan view of a clamping collar.

Fig. '7 is a section on line l--l of Fig. 6.

Fig. 8 is a side view of the honing apparatus.

Fig. 9 is an end view of Fig. 8.

Fig. 10 is a bottom plan view of Fig. 9.

Fig. 11 is a perspective view of a work support.

A frame member I0 supports a flanged sleeve l2 on which is bolted a horizontal supporting plate It having a peripheral side wall. The plate It has two tapered holes l6 through each of which projects a lon spindle housing l8, each spindle housing being clamped in a position slightly inclined to the vertical as will appear. A driven spindle is journalled in each housing,

- there being near the top two abutting ball bearings 22 whose outer race rings are clamped against a shoulder in the housing by a cap 24, a single ball bearing 26 near the bottom having its outer floating race ring covered by a cap 28. The inner race rings of the upper and lower bearings are spaced by a spacing sleeve 30.

At the top the spindle 20 is tapered and a work engaging roll 32 with a tapered bore is removably clamped thereto by a clamping plate 34 secured by a screw. The spindle also has an enlargement with annular ribs 36 mating with similar ribs on the cap 24 to form a labyrinth sea]. A pulley 38 is secured to each spindle and both pulleys are driven by a belt Ml which extends around a pulley 42 which is driven by a belt M. The pulley 42 is journalled by roller hearings on a stud carried by a bell crank lever 46, the long arm of which is pivoted at 38 to the frame, a spring 50 attached to the short arm keeping the belt 30 tight in spite of any variation in the inclination of the spindles.

For adjusting the spindle housings it to inclined positions, each housing has a flange 52 resting on a wedge ring 5i one face 53 of which slants at a small angle to the opposite face so that the ring gradually increases in thickness from the low side to the high side. At a point half way between the low side and the high side, a pin 58 projects radially so that the wedge ring can be turned to locate the low side where desired, the location preferably being from the spot where the work engages the roll 32. Otherwise stated, the spindle housing and the spindle will have their maximum inclination in plane through the high and low sides of the wedge ring and this plane will be at right angles to a line connecting the axis of the work piece and the axis of the roll 32. This will give the maximum effect to the inclination of the roll axis, the efiect being to urge the work downwardly when the roll rotates in the direction indicated by the arrow. For different sizes of work, the wedge ring will be turned by means of the pin 58 to procure the desired location of the low side. Once the wedge ring is adjusted, the spindle housing is clamped by a clamping collar 63 having a flange 62 overlying the flange 52, the body of the collar being secured to the plate M by screws St. A portion of the collar is cut out at the bottom at $6 in the region where the pin 58 projects from the wedge ring. The collar is also cut away for its entire thickness in the region 68 nearest the work this being to make room for a work support.

The work W is herein indicated as the inner race ring of a roller bearing, the ring being externally grooved to form a raceway for the rollers. This raceway is a finished surface engaged by a flange or projection on each of the driving rolls 32 and on an idler roll 69. The lower flat face of the work piece W rests by gravity on and is urged by the rolls 32 against three hardened work rests Ill preferably of tungsten carbide brazed to slotted blocks or supports and all accurately faced oil to lie in a common horizontal plane. There is one center support 12 and two side supports Hi. The latter are slabbed off at Hi to approach closely to the cut away portion 68 of the adjacent clamping collar, thus to give a rigid support to the rests which support the work as the latter is urged downwardly by the skewed rolls. Each support has a shouldered slot 18 for a headed the rolls 32 in accordance with the diameter of the work and to apply radial pressure. The roll is journalled on a ball bearing 82 whose inner race ring is clamped on a shouldered stud 84, the outer race ring being clamped in the roll by threaded caps 86. Shields and a spacer are clamped on the stud 84 which is carried by a fork 92 formed on an angularly adjustable and reciprocable piston rod 94. The rod projects through a stuffing box 96 into-an air cylinder 98 which forms an adjustably mounted carrier for the pressure roll and a guide for the rod. The end of the rod is reduced in diameter to receive a piston I00 and to extend into a grooved guide bushing I02 carried by a cylinder head I04. The bottom of the cylinder has a central tongue I06 guided in a groove I08 in the plate I4 while the cylinder has slotted feet H0 at the sides for clamping screws which secure the cylinder in an adjusted position along the plate I4 depending on the diameter of the work. Air admitted through a port in the side of the cylinder retracts the piston and air admitted through a port in the head I04 applies the pressure with which the rolls yieldably engage the work.

The axis of the roll 69 can be skewed to a selected small angle to urge the rotating work downwardly and this is accomplished by turning the piston rod to a selected angular position. The roll 69 turns about its axis in the same direction as the rolls 32 and accordingly the upper end of the axis of roll 69 is tilted forwardly in a plane extending crosswise of the piston rod. A plate I I2 is secured on the fork 92 by screws and has an arm II4 entering a slot in a plate or segment IIB angularly adjustable on the cylinder. The segment has a tongue I I8guided in a groove of the cylinder and has shouldered slots I20 for clamping screws I22. Only a small skew or inclination of the roll axis is desirable and hence the slots I20 provide sufiicient lateral displacement of the slotted plate or segment H6 to one side of a central position to select the inclination. The arm H4 and the slotted plate I I6 form a keying connection between the rod and its guide.

A hone I30 is reciprocated vertically along the interior surface of the work piece W at a. point opposite to the space between the driven rolls. The hone extends through slots I32 in a holder I 34. a shim I36 being interposed between the hone and the bottom wall I38 of the holder and the ends of the shim having downwardly extending lugs I40 which embrace the ends of the bottom wall. Screws I42 engage the shim to clamp the bone against the upper ends of the slots. The opposite ends of the holder are rounded to better fit within a circular work piece. The upper face of the holder has a pair of kerfs in which the lower ends of two reed springs I44 are cl mped by shims I 40 backed up by set screws. The upper ends of the reed springs are similarly secured in grooves in the lower face of a plate I48. The springs are normally parallel to each other and to the axis of the supported work piece.

The holder I34 has an upwardly projecting lug I50 which is tapped to secure an adjusting screw I52 which is cl mped by a set screw. One end of the screw I52 projects through a hole in the forward reed spring. The screw has a collar engaged by a coil spring I54 which reacts laterally against 8. lug I56 on the upper plate I40, the lug I entering a notch I58 in the plate I48 to limit flexing of the springs. The plate I48 has a hollow enlargement I00 which is clamped by set screws to the shank of a vertically reciprocating member (not shown).

When honing the bore of the work piece W, the hone I30 is reciprocated vertically parallel to the work axis, the coil spring I54 holding the hone against the work and the reed springs I44 compelling the hone holder to maintain a parallel motion so that the honing face stays in vertical alignment with the work surface and exactly perpendicular to the finished lower face of the work which is supported by the unyielding rests T0. The hone engages the work half way between the rolls 32 and this is important in correcting slight errors introduced by reason of previous centerless grinding.

The same apparatus is adapted to hone an exterior surface as indicated by the broken line showing of the hone I30A in Fig. 3A. Here the hone engages the raceway surface R between the flanges of the work piece W and is reciprccated vertically. The pressure of the hone is light and is resisted by the idler roll 69 or by the hone I30 if the bore is honed at the same operation.

I claim:

1. In a machine for honing rings, a hone, a reciprocating support for the hone, supporting means for the end of a ring, a pair of rolls engaging the periphery of the ring, a spindle for driving each roll, a flanged spindle housing having bearings for the spindle, a supporting plate having an opening for the spindle housing, and a wedge ring clamped between the plate and the housing flange to secure the spindle housing and the roll axis at an inclination to the work axis.

2. In a machine for honing rings, a hone, a reciprocating support for the hone, a supporting plate, means on the plate to engage and support the end face of a work ring, driven rolls spaced apart and engaging the periphery of the ring,

means for urging the work ring against the driven rolls, a spindle for driving each roll, a

. spindle housing extending through the supporting plate and having a supporting flange above the plate, a wedge ring, and means for clamping the wedge ring between the supporting plate and the flange to hold the spindle housing and the roll axis at an inclination to the work axis.

3. In a machine for honing rings, a hone, a

- reciprocating support for the hone, a supporting plate, means rigidly mounted on the plate in a fixed unvarying plane to engage and support the end face of a work ring, driven rolls spaced apart and engaging the periphery of the ring, means for urging the work ring against the driven rolls. a spindle for driving each roll, a spindle hous ng having bearings for each spindle and extending through an opening in the supporting plate, and means for securing one end of each spindle housing to the supporting plate in an inclined position with respect to the work axis.

4. In a machine for honing rings, a supporting plate, a plurality of non-yielding supports rigidly mounted on the supporting plate and having hardened work seats fixed in a common plane to engage and support the end face of a work ring, a pair of driven rolls spaced apart and engaging the periphery of the work ring, the axis of the rolls being at an inclination to the work axis to cause the surface of the rolls to have wiping contact with the work surface in a direction to urge the work against; the hardened seats, means for urging the work ring against the driven rolls, and a hone shiftable at right angles to the,

common plane of the work rests.

5. In a machine for honing rings, a supporting plate, a series of at least three supports rigidly mounted on the plate in a common plane to engage and support the end face of a work ring, driven rolls spaced apart and engaging the periphery of the ring, a pressure roll for urging the work ring against the driven rolls, a piston rod revolubly supporting the pressure roll, a cylinder shiftable along the supporting plate towards or from the driven rolls, and means for securing the cylinder in adjusted position on the plate.

6. In a machine for honing rings, driven rolls spaced apart and engaging the periphery of a work ring, a pressure roll engaging the periphery of the ring, a cylinder, and a piston rod projecting from the cylinder and having means to rotatably support the pressure roll with its axis at a selected inclination to the work axis.

7. In a machine for honing rings, driven rolls spaced apart and engaging the periphery of a work ring, a pressure roll engaging the periphery of the ring, a, cylinder, an angularly adjustable piston rod projecting from the cylinder and having means to rotatably support the pressure roll, an arm entering a slotted plate, one of the last named members being secured to the piston rod and the other member being secured to the cylinder,'and one member being adjustable laterally with respect to the piston rod.

8. In a machine for honing rings, driven rolls spaced apart and engagin the periphery of a work ring, supporting means engaging one end of the ring, a plate shiftable parallel to the ring axis, a hone holder, parallel springs extending 6 parallel to the direction of shifting of the plate and connecting the hone holder to the plate, and a hone secured to the holder and engaging the ring at a point opposite to thespace between the driven rolls.

9. In a machine for honing rings, a plate shiftable parallel to the ring axis, a hone holder, springs extending parallel to the ring axis for connecting the holder to the plate, a hone secured to the holder, and a spring reacting laterally between the plate and the holder.

10. In a machine for honing rings; driven rolls spaced apart and engaging the periphery of the work ring, a pressure roll urging the ring against the driven rolls, and a hone in the space between the driven rolls and engaging the exterior of the work ring in opposition to the pressure roll.

11. In a machine for honing rings, driven rolls spaced apart and engaging the periphery of the work ring, a pressure roll urging the ring against the driven rolls, a hone engaging the ring at a point opposite to the space between the driven rolls, and a hone engaging the opposite surface of the work ring in opposition to the first hone.

PHILIP H. HUTCHINSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

